/*
 * Copyright 2009-2010 Nanjing RedOrange ltd (http://www.red-orange.cn)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package redora.client.mvp;

import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent;
import redora.client.Persistable;
import redora.client.validation.BusinessRuleViolation;

/**
 * After a delete is invoked in the service object, the service
 * object will fire an DeleteEvent when it has retrieved a response
 * from the server.
 *
 * @author Nanjing RedOrange (www.red-orange.cn)
 * @see ServiceBase#delete(redora.client.Persistable)
 */
public class DeleteEvent extends GwtEvent<DeleteEvent.Handler> {
    public static Type<DeleteEvent.Handler> TYPE = new Type<DeleteEvent.Handler>();

    /**
 * Note that there is no onError event. When an error occurs, this
 * will be notified directly to the info/error message label.
 * @author Nanjing RedOrange (www.red-orange.cn)
 */
public interface Handler extends EventHandler {
    /** Deleted successfully.*/
    void onSuccess(DeleteEvent event);
    /** Business rules were violated. See event.violations for the violations.*/
    void onViolation(DeleteEvent event);
}

    public final Persistable pojo;
    public final BusinessRuleViolation[] violations;
    public final Class<? extends Persistable> cls;

    public DeleteEvent(Class<? extends Persistable> cls, Persistable pojo) {
        this.cls = cls;
        this.pojo = pojo;
        violations = null;
    }

    public DeleteEvent(Class<? extends Persistable> cls, Persistable pojo, BusinessRuleViolation[] violations) {
        this.cls = cls;
        this.pojo = pojo;
        this.violations = violations;
    }

    @Override
    public Type<DeleteEvent.Handler> getAssociatedType() {
        return TYPE;
    }

    @Override
    protected void dispatch(DeleteEvent.Handler handler) {
        if (violations == null)
            handler.onSuccess(this);
        else
            handler.onViolation(this);
    }
}

